tuning sub from HU?

i am getting my first system soon and was woundering if i have my subs connected to a amp i connect to amp to the pre outs on the HU so do i tune the HPF and LPF and SSF for the sub on the hu or are those on the amp and i set the ones on the HU for the 6 x 9s? any info on any thing related to this and tuning a systme would be great thanks thinking of getting a pioneer DEH-P480MP

Re: tuning sub from HU?

ah sorry about grammer i try to type to fast.

i am going to be running 1 or 2 amps one mon for 2 type r's and then probley 2 6 x 9 and maybe at some time 2 more speakers off probley a 4 channle amp. is 2 pairs of speakers to 1 amp 1 pre out? thanks